KG-46/MYK7  Satellite Ground Station Encryptor/Decryptor
The KG-46/MYK7A is a satellite telemetry and mission decryptor which first came into service in 1991. At the time it was the smallest satellite decryptor ever produced.
This KG-46 is made by Mykotronx and is on display at the National Cryptologic Museum. The placard describing it shows it as the MYK7A which is a Mykotronx product. Hopefully the text below will link the MYK7A designator with KG-46 designator. (Photo by Ralph Simpson)

* Satellite telemetry and mission data decryptor (uses KG-28/46 algorithm).
* Cryptographically compatible with the KG-46, MYK-11, KGA, MYK-6, MYK-5, KGR-28, and ELWELL (KGR-62).
* Half-height computer peripheral configuration. EKMS (DS-102) key interface.
* Maximum data rate of 10 Mbps.
* Compliant with NSTISSAM TEMPEST/1-91 requirements.
* Controlled Cryptographic Item (CCI).
* Endorsed by NSA for Type 1 applications control and status via front panel or remote control interface (RS-232).
* Stand-alone, embedded, and rack mount installations (MYK-7F4 & MYK-7F6) holding four and six units respectively.
* Key storage of 32 traffic keys (max).
* Cryptographic bypass, Cipher Text invert, and zeroization capabilities.
* Streamlined front panel control and display.
* Radiation tolerant and ruggedized for multiple application installations.


Data Rate: 50 K to 2 Mbps (TEMPEST)
Operating Voltage: 12 Vdc (110 Vac 50-70 Hz)
Power Consumption: 7W (max.)
Data Interface: RS-232C
MTBF: 100,000 hours (11.4 yrs.) est.
Weight: 3.5 lbs.
Dimensions: 1.65" H x 5.875" W x 8" D (half-height computer peripheral)
Operating Temperature: 0 to 50º C
Storage Temperature: -40 to 60º C
Vibration: 3 g's RMS - 3 min./axis
Shock: 30 g's - 11 msec-
Altitude: 12,000 ft. (max.)
Humidity: 5 to 95% non-condensing

Credits and References:

1) Ralph Simpson <ralphenator(at)>

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Apr 8/12